what is does smart mean in helm-case-fold-search?

[lewang]

From the manual

Searches in Emacs normally ignore the case of the text they are searching
through, if you specify the text in lower case. Thus, if you specify
searching for ‘foo’, then ‘Foo’ and ‘foo’ also match. Regexps, and in
particular character sets, behave likewise: ‘[ab]’ matches ‘a’ or ‘A’ or ‘b’
or ‘B’.

An upper-case letter anywhere in the incremental search string makes the search case-sensitive.

How is this different than the 'smart setting of helm-case-fold-search?

[thierryvolpiatto]

Le Wang notifications@github.com writes:

How is this different than the 'smart setting of helm-case-fold-search?

pattern "foo" match "foo" and "Foo"
pattern "Foo" match only "Foo"

Thierry
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gpg --keyserver pgp.mit.edu --recv-keys 59F29997

[lewang]

Unless I'm missing something obvious,

That is case-fold-search == t. What is helm-case-fold-search == 'smart?

[thierryvolpiatto]

Le Wang notifications@github.com writes:

Unless I'm missing something obvious,

That is case-fold-search == t.
No.

What is helm-case-fold-search == 'smart?
if pattern contain upcase characters case-fold-search == nil is used.
if pattern contain only downcase characters, case-fold-search == t is
used.

See definition of helm-set-case-fold-search and documentation of
helm-case-fold-search.

Thierry
Get my Gnupg key:
gpg --keyserver pgp.mit.edu --recv-keys 59F29997

[lewang]

if pattern contain upcase characters case-fold-search == nil is used.
if pattern contain only downcase characters, case-fold-search == t is
used.

This is the effect of case-fold-search == t. Case-sensitive only when
search-string has one or more upper-case letters (as described in the manual
link above).

[thierryvolpiatto]

Le Wang notifications@github.com writes:

if pattern contain upcase characters case-fold-search == nil is used.
if pattern contain only downcase characters, case-fold-search == t is
used.

This is the effect of case-fold-search == t. Case-sensitive only when
search-string has one or more upper-case letters (as described in the manual
link above).
No, the link is about isearch behavior, not general searching/matching
in emacs (i.e string-match, (re)-search-forward etc...)
Just try with a precedent version of helm matching foo and Foo and you
will understand what I mean.

Thierry
Get my Gnupg key:
gpg --keyserver pgp.mit.edu --recv-keys 59F29997

[lewang]

OK. I see. Thanks for the clarification.